PSI: Shared State as the Missing Layer for Coherent AI-Generated Instruments in Personal AI Agents

2026-04-09

AI Summary

Current AI-generated personal tools often operate in isolation, lacking coordination and consistency. This work proposes the PSI architecture, which introduces shared state as a foundational system-level primitive to enable automatic integration and cross-tool collaborative reasoning through a unified state bus. The architecture features a shared personal context bus, mechanisms for state publication and write-back, and seamless integration with general-purpose chat agents and graphical user interfaces. Over a three-week autobiographical deployment, the system demonstrated that newly generated tools can automatically connect via a common contract, progressively constructing a coherent, persistent, and interactive personal computing environment.

Abstract

Personal AI tools can now be generated from natural-language requests, but they often remain isolated after creation. We present PSI, a shared-state architecture that turns independently generated modules into coherent instruments: persistent, connected, and chat-complementary artifacts accessible through both GUIs and a generic chat agent. By publishing current state and write-back affordances to a shared personal-context bus, modules enable cross-module reasoning and synchronized actions across interfaces. We study PSI through a three-week autobiographical deployment in a self-developed personal AI environment and show that later-generated instruments can be integrated automatically through the same contract. PSI identifies shared state as the missing systems layer that transforms AI-generated personal software from isolated apps into coherent personal computing environments.

Problem

• shared state
• personal AI agents
• AI-generated instruments
• coherent computing environment
• isolated modules

Innovation

• shared state
• AI-generated instruments
• personal AI agents
• coherent computing environment
• cross-module reasoning